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 #ifndef PREVIEWDIALOG_H
 #define PREVIEWDIALOG_H

 #include &lt;QDialog&gt;
 #include &lt;QPrinter&gt;
 #include &lt;QList&gt;
 #include &lt;QStringList&gt;
 #include &quot;ui_previewdialogbase.h&quot;
 #include &quot;previewlabel.h&quot;

 class QTreeWidgetItem;

 typedef QList&lt;QTreeWidgetItem *&gt; StyleItems;

 Q_DECLARE_METATYPE(StyleItems);

 class PreviewDialog : public QDialog, private Ui::PreviewDialogBase
 {
     Q_OBJECT

 public:
     PreviewDialog(QPrinter &amp;printer, QWidget *parent);
     enum { SmallPreviewLength = 200, LargePreviewLength = 400 };

     bool isSelected(int index);

 signals:
     void pageRequested(int index, QPainter &amp;painter, QPrinter &amp;printer);

 protected:
     void resizeEvent(QResizeEvent *);

 public slots:
     void accept();
     void addPage();
     void on_pageList_currentItemChanged();
     void on_paperSizeCombo_activated(int index);
     void on_paperOrientationCombo_activated(int index);
     void reject();
     void setNumberOfPages(int count);

 private:
     void paintItem(QTreeWidgetItem *item, int index);
     void paintPreview(QPixmap &amp;pixmap, int index);
     void setupComboBoxes();

     PreviewLabel *previewLabel;
     QPrinter &amp;printer;
     bool canceled;
     int currentPage;
     int pageCount;
 };

 #endif</pre>
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